– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Mon 09 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Mon 09 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 09 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA heavy fall of snow, heaviest during Mon afternoon. Becoming milder with moderate rain (total 12mm) on Wed afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -3°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the W by Wed night). | Days 5–7 Weather SummaryA light fall of snow, heaviest on Thu night. Turning milder with light rain (total 10mm) on Fri morning. Freeze-thaw conditions (max 2°C on Thu afternoon, min -5°C on Sat night). Wind will be generally light. | ||||||||||||||||
Mon 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | | | | | | |  |  | |  | |  | |
light snow | mod. snow | some clouds | light snow | light snow | light snow | light snow | light snow | light snow | light snow | mod. snow | mod. rain | cloudy | light snow | snow shwrs | cloudy | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
4 | 6 | — | 2 | 5 | 2 | 2 | 1 | 1 | 3 | 10 | — | — | 4 | 1 | — | — | |
— | — | — | — | — | — | 5 | 8 | — | — | — | 10 | — | — | — | — | — | |
max °C | 0 | -2 | 0 | 1 | 1 | 2 | 3 | 6 | 1 | 2 | 2 | 2 | 2 | 0 | -1 | 0 | -3 |
min °C | 0 | -3 | -3 | 0 | 0 | 1 | 2 | 1 | 0 | 1 | 1 | 2 | 1 | -4 | -3 | -1 | -5 |
-4 | -5 | -3 | -4 | -3 | 1 | -2 | -4 | -4 | -2 | -1 | 2 | -1 | -4 | -3 | -3 | -5 | |
450 | 200 | 450 | 550 | 550 | 750 | 1300 | 800 | 650 | 800 | 800 | 900 | 600 | 0 | 350 | 400 | 0 | |
Cloud base (m) | 600 | 600 | 600 | 800 | 600 | 600 | 550 | 600 | 750 | 600 | 550 | 550 | 550 | 600 | 650 | 650 | 650 |
 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — |
 | 7:02 | — | — | 7:05 | — | — | 7:06 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A heavy fall of snow, heaviest during Mon afternoon. Becoming milder with moderate rain (total 12mm) on Wed afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -3°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the W by Wed night).
South Twin Sister Weather (Days 3-6):
A light fall of snow, heaviest on Thu night. Turning milder with light rain (total 10mm) on Fri morning. Freeze-thaw conditions (max 2°C on Thu afternoon, min -5°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.